Jodie, I think too much caffiene can affect the swimmers, but not 100% sure on if it is true or just a wives tale.

Abs, check out Coles for the 12 pack of coke Zero in the little half size cans - I find it hard to get through a whole one too.

I drink coke Zero since they brought that out and hardly drink it in winter cause I don't like cold drinks when it is cold LOL, unless it is milk. When it is hotter weather, I might drink a can every two days and when I am on In-Liven I rarely drink it.